TP-Link HS200 Kasa Smart White Wi-Fi Single Pole One Way Light Switch Set Of 3. This smart light switch set includes two switches that are compatible with Microsoft Cortana, Google Assistant, and Amazon Alexa. They have a Wi-Fi connection and feature on/off functionality. The switches are circular in design and are suitable for single pole setups. Neutral Wire Required. The product is made by TP-LINK in China and comes with a California Prop 65 warning.